New York City artist Sam Simon says Big Gay Ice Cream hired him in 2011 to paint a unicorn mural in the East 7th Street store.

New York City artist Sam Simon says Big Gay Ice Cream hired him in 2011 to paint a unicorn mural in the East 7th Street store — but now claims the popular dessert purveyor has since infringed on that design.

Simon's mural features many distinctive elements, such as the fact that the "feminine unicorn" wears a Bea Arthur pendant.

After Simon's mural was completed, Big Gay Ice Cream hired another artist to copy the design and use it as the company's logo — including on merchandise, he alleges in a new Manhattan federal lawsuit.

The allegedly unscrupulous unicorn has reared its head not only at Big Gay's stores, but in a book and clothing.

Reps for Big Gay could not immediately be reached.

Sam Simon now claims the popular dessert purveyor has since infringed on that design.